Our collaboration has been developing position sensitive
CdZnTe detectors for hard x-ray astrophysics research in the
10-350 keV range. Our latest advance is a prototype detector
that consists of a three dimensional position sensitive
CdZnTe detector, 25 mm x 25 mm x 2 mm, with 1 mm pitch
crossed strip electrodes, an interleaved steering electrode,
and an Application Specific Integrated Circuit (ASIC) for
individual electrode readout. The first balloon flight test
of this detector is scheduled for Spring 2000. We will
present laboratory results from the 25 mm x 25 mm detector,
updates and refinements to previous balloon flight data, and
preliminary spectra from the new balloon flight. This
research is funded by the NASA Office of Space Science and
the NASA Graduate Student Researchers Program.

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